用UML進(jìn)行分析設(shè)計.ppt

1、Copyright 1997 by Rational Software Corporation,Analysis and Designwith UML,Copyright 1997 by Rational Software Corporation,Agenda,Benefits of Visual Modeling History of the UML Visual Modeling with UML The Rational Iterative Development Process,Copyright 1997 by Rational Software Corporation,“Model

2、ing captures essential parts of the system.” Dr. James Rumbaugh,Visual Modeling is modeling using standard graphical notations,What is Visual Modeling?,Copyright 1997 by Rational Software Corporation,Use Case Analysis is a technique to capture business process from users perspective,Visual Modeling

3、Captures Business Process,Copyright 1997 by Rational Software Corporation,Visual Modeling is a Communication Tool,Use visual modeling to capture business objects and logic,Use visual modeling to analyze and design your application,Copyright 1997 by Rational Software Corporation,Visual Modeling Manag

4、es Complexity,Copyright 1997 by Rational Software Corporation,Model your system independent of implementation language,Visual Modeling Defines Software Architecture,Copyright 1997 by Rational Software Corporation,Multiple Systems,Visual Modeling Promotes Reuse,Reusable Components,Copyright 1997 by R

5、ational Software Corporation,What is the UML?,UML stands for Unified Modeling Language The UML combines the best of the best from Data Modeling concepts (Entity Relationship Diagrams) Business Modeling (work flow) Object Modeling Component Modeling The UML is the standard language for visualizing, s

6、pecifying, constructing, and documenting the artifacts of a software-intensive system It can be used with all processes, throughout the development life cycle, and across different implementation technologies,Copyright 1997 by Rational Software Corporation,History of the UML,Copyright 1997 by Ration

7、al Software Corporation,UML Supports Application Development,Classes,application partitioning,Business Objects,Relationships,Business Process,Objects,Use Cases,large scale system,Scenarios,Components Microsoft,ActiveX/COM Microsoft,ORDBMS Oracle,CORBA OMG,Copyright 1997 by Rational Software Corporat

8、ion,UML Concepts,The UML may be used to: Display the boundary of a system some delivered Attack risks through demonstrable progress Progress measured in products, not documentation or engineering estimates,Copyright 1997 by Rational Software Corporation,Resulting Benefits,Releases are a forcing func

9、tion that drives the development team to closure at regular intervals Cannot have the “90% done with 90% remaining” phenomenon Can incorporate problems/issues/changes into future iterations rather than disrupting ongoing production The projects supporting elements (testers, writers, toolsmiths, CM,

10、QA, etc.) can better schedule their work,Copyright 1997 by Rational Software Corporation,Risk,Preliminary Iteration,Architect. Iteration,Architect. Iteration,Devel. Iteration,Devel. Iteration,Devel. Iteration,Transition Iteration,Transition Iteration,Post- deployment,Time,Risk Profile of an Iterativ

11、e Development,Copyright 1997 by Rational Software Corporation,Risk Management Phase-by-Phase,Inception Bracket the projects risks by building a proof of concept Elaboration Develop a common understanding of the systems scope and desired behavior by exploring scenarios with end users and domain exper

12、ts Establish the systems architecture Design common mechanisms to address system-wide issues,Copyright 1997 by Rational Software Corporation,Risk Management Phase-by-Phase (cont.),Construction Refine the architecture Risk-driven iterations Continuous integration Transition Facilitate user acceptance

13、 Measure user satisfaction Post-deployment cycles Continue evolutionary approach Preserve architectural integrity,Copyright 1997 by Rational Software Corporation,Initial Project Risks Initial Project Scope,Revise Overall Project Plan Cost Schedule Scope/Content,Plan Iteration N Cost Schedule,Assess Iteration N,Risks Eliminated,Revise Project Risks Reprioritize,Develop Iteration N Collect cost and quality metrics,Define scenarios to address highest risks,Iteration N,Risk Reduction Drives Iterations,Copyright 1997 by Rational